This puzzle:

Andrea Carla Michaels notes: At this point I was only making one a year, if that. I hadn't started
thinking of myself as a constructor yet. Simply a solver who had
ideas from time to time. But I loved coming up with themes, which TV Guide didn't care about.
GILLIGANSISLAND was a perfect 15 across and I started putting in
character names and some of the actors real names.
Will said "All character names or all real names, no mixing.
Again, I was flabbergasted by the synchronicity of FOUR of the actors
having complementary lengths! TINALOUISE/ALANHALEJR (The Jr was a
slight fudge, but that IS how he's credited) JIMBACKUS/BOBDENVER. I
felt bad about having to leave out the Professor and Mary Ann (not to
mention Mrs. Howell) but even on the show the first few years they were
just "And the rest..."!

This was my first experience of having five theme answers, as I used
to think just in threes, preferably all 15s going straight across.
Actually I still do!